Larry Konner and Mark Rosenthal wrote the screenplay for
Superman IV, based on the premise, proposed by Christopher
Reeve, that Superman would intervene in the nuclear arms race.
The way Reeve saw it, Superman had been used
as a morale booster for the troops in World War II and he felt that
the character could once again have an effective role in the real
world.

Gene Hackman returned to the role of Lex Luthor, criminal
mastermind.
Among other things, Luthor manages to create a super-powered adversary
for Superman, using the genetic material from a single strand of
Superman's hair as a starting point.

The film also brings a new insight to the relationship between Lois
Lane, Clark Kent, and Superman.

"I just wish that you could all see the Earth the way that I see
it - because when you really look at it, it's just one world."

"For me, Quest for Peace is the most personal
Superman of the entire series. It directly reflects what
Superman should be, and what he should be doing."